BCM changes? Dealer only?

[GTPprix]

Not to sound like a smartass but just to make sure you guys understand neither a Tech 2 nor TIS will allow you to modify a BCM calibration; just an FYI. Setup a new BCM (BPP and SDM learn yes, custom changes no).

 

[swathdiver]

That's right. I think though that it our engine computers are in C++ but not sure. Would like to know so then I could modify a calibration and install it via the Tech2 or AutoCal.

 

[LanceD]

AKAIK you need the appropriate GM scan tool. For the GMT900 you need access to a Tech2. You can buy your own and purchase a 3 day subscription and program modules yourself or have the dealer do it.

Every man ought to have a Tech2 for his truck. It's as essential as a box of wrenches.

Subscription? Elaborate please. You can't just plug it in whenever and modify things or check codes?

 

[swathdiver]

In order to program Lance, you need access to the Tis2Web service to get the appropriate modules for the vehicle being worked on. It requires a subscription and I think the 3 day for $55 is the minimum.

One can of course check codes, monitor, test and do all sorts of other things without needing the above service. I have not done the above but have done all kinds of other stuff with mine since, which I've posted about on this forum to share and add to the knowledge base.